Tensor Veli Palatini
Soft Palate · Head & Neck
The tensor veli palatini is a thin, triangular muscle of the soft palate. It arises from the scaphoid fossa and medial pterygoid plate of the sphenoid, the spine of the sphenoid, and the cartilage of the auditory (Eustachian) tube, then descends and hooks around the pterygoid hamulus, turning almost at a right angle to spread out as the palatine aponeurosis. Its dual action follows from these attachments: it tenses the soft palate, giving the other palatal muscles a firm sheet to work against, and it opens the auditory tube during swallowing and yawning, which equalises middle-ear pressure. Alone among the palatal muscles it is supplied by the mandibular nerve (CN V3), through the nerve to medial pterygoid, because it shares the developmental origin of the muscles of mastication.
Origin, Insertion, Action & Nerve
Origin
Scaphoid fossa and medial pterygoid plate of the sphenoid, spine of the sphenoid, and cartilage of the auditory tube
Insertion
Palatine aponeurosis (after hooking around the pterygoid hamulus)
Action
Tenses the soft palate and opens the auditory (Eustachian) tube during swallowing and yawning
Nerve
Medial pterygoid nerve from the mandibular nerve (CN V3)
Attachments explained
The Tensor Veli Palatini is defined first by where it attaches. Its origin is the more fixed anchor, usually the proximal or more stable end that stays put during contraction, while its insertion is the more mobile point that is pulled toward the origin when the muscle shortens.
Origin
Scaphoid fossa and medial pterygoid plate of the sphenoid, spine of the sphenoid, and cartilage of the auditory tube
Insertion
Palatine aponeurosis (after hooking around the pterygoid hamulus)
Action & function
When the Tensor Veli Palatini contracts, it produces the following movement: Tenses the soft palate and opens the auditory (Eustachian) tube during swallowing and yawning.
As part of the Soft Palate group of the Head & Neck, it works alongside neighbouring muscles to generate smooth, coordinated movement and to stabilise the structures it acts on.
Nerve supply & clinical relevance
The Tensor Veli Palatini receives its nerve supply from the Medial pterygoid nerve from the mandibular nerve (CN V3).
Because a muscle can only contract when its nerve is intact, injury to the Medial pterygoid nerve from the mandibular nerve can weaken or paralyse the Tensor Veli Palatini, impairing the movements it normally produces (tenses the soft palate and opens the auditory (Eustachian) tube during swallowing and yawning). This is why knowing the innervation is central to localising nerve lesions in clinical practice.
How to study the Tensor Veli Palatini (the OIANS method)
Trace its tendon around the pterygoid hamulus, because that pulley is the key to the muscle. The hamulus redirects the pull so a vertically descending muscle can tense a horizontal aponeurosis. Picturing the tendon bending around this hook makes both the name tensor and its flattening action on the palate memorable.
Use the innervation as the standout fact: tensor veli palatini is the only palatal muscle supplied by CN V3 rather than the vagus, a consequence of its first-arch, masticatory origin. Couple that with its second job of opening the auditory tube, and you can explain why swallowing helps clear the ears, tying nerve and action into one clinical hook.
Frequently asked questions
Where is the Tensor Veli Palatini located?
The Tensor Veli Palatini is a muscle of the Soft Palate group, located in the Head & Neck.
What is the origin of the Tensor Veli Palatini?
Scaphoid fossa and medial pterygoid plate of the sphenoid, spine of the sphenoid, and cartilage of the auditory tube
What is the insertion of the Tensor Veli Palatini?
Palatine aponeurosis (after hooking around the pterygoid hamulus)
What movements does the Tensor Veli Palatini produce?
Tenses the soft palate and opens the auditory (Eustachian) tube during swallowing and yawning
What nerve supplies the Tensor Veli Palatini?
Medial pterygoid nerve from the mandibular nerve (CN V3)
Is the Tensor Veli Palatini free to study in OIANS?
The Tensor Veli Palatini is always free to browse. Its full origin, insertion, action and nerve details are open to everyone in the Muscle Directory. Quiz and Flashcard practice for the Head & Neck is part of the one-time Lifetime upgrade, though; only the Upper Limb decks are free to test yourself on.
Related muscles
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